Summary
Culper Research has published a scathing short report alleging that Archer Aviation (NYSE: ACHR) has systematically misled investors about the development progress of its Midnight eVTOL aircraft. The report centers on claims that Archer's June 2024 "transition flight" was a staged stunt that violated FAA regulations, with the company adding propeller blades and keeping them powered throughout what was supposed to be wing-borne flight. Culper alleges this deception was designed to unlock $55 million in funding from Stellantis while concealing fundamental aircraft stability issues.
Who is Archer Aviation
Archer Aviation is a publicly traded electric vertical takeoff and landing (eVTOL) aircraft manufacturer focused on developing urban air mobility solutions. The company's flagship product is the Midnight aircraft, designed as an electric air taxi capable of carrying passengers in urban environments. Archer has positioned itself as a leader in the emerging eVTOL market, competing directly with companies like Joby Aviation. The company has raised significant capital through public markets and formed partnerships with major airlines and automotive manufacturers, including Stellantis, to support manufacturing and commercialization efforts.
Key Points from Report
The Staged "Transition Flight" Deception
- In June 2024, Archer claimed Midnight completed its first transition flight but violated FAA regulations by adding extra propeller blades to aft rotors and keeping them spinning throughout the supposed wing-borne flight segment
- FAA airworthiness criteria explicitly require aft rotors to be shut down and propellers faired in line during transition, but Archer's own footage shows propellers continuously spinning at 200-300 RPM
- The staged flight was designed to unlock $55 million in Stellantis funding, which Archer received just three weeks later, while concealing what the company's own patent filing describes as "potentially catastrophic" stability issues
Manufacturing and Testing Misrepresentations
- Archer claimed in February 2025 that its manned Midnight was "fully assembled" and "finishing up ground tests," but internal emails with Salinas Fire Department reveal the flight test team didn't receive the aircraft until early March
- Photos from April 2025 fire department visits show the supposedly assembled aircraft in disrepair with exposed internals, open panels, and wooden blocks taped to the fuselage
- Despite claims of being "on track to start piloted flights within days" as of May 12, 2025, investigators observed only a single low-speed ground run over eight days with the aircraft never leaving the ground
Design Changes and Development Setbacks
- The current manned Midnight represents a complete aircraft overhaul with significant changes to fuselage, landing gear, wings, boom arms, and propeller systems, contradicting claims of a "mature design" requiring "no modifications"
- Former Archer executives confirmed ongoing design changes across multiple aircraft components including fuselage, wing structure, and propellers within the past year, explaining production delays
- Archer quietly abandoned plans to build six "fully conforming" aircraft, producing instead just one partially conforming prototype while certification progress stalled from 12% to 15% over two quarters
Activ8 Analysis
The Culper Research findings present serious concerns about Archer Aviation's transparency and operational integrity in its pursuit of eVTOL commercialization. The central allegation that the company staged a transition flight to unlock funding while concealing aircraft stability issues represents a significant breakdown in corporate governance and investor communication standards. The systematic pattern of missed milestones, design overhauls disguised as minor modifications, and public statements contradicted by internal documentation suggests fundamental challenges in both technical execution and management credibility.
The documentation of substantial aircraft design changes following the alleged transition flight indicates that Archer may be facing more significant engineering challenges than publicly disclosed. The shift from claims of building six conforming aircraft to producing a single partially conforming prototype, combined with the company's first-time admission in regulatory filings that FAA certification may not be achieved "at all," signals potential material changes to the business timeline and viability that warrant careful investor consideration.